Regulation 1 I1 United Kingdom Original text. Later amendments are not shown. These Regulations may be cited as the Aircraft (Customs and Excise) Regulations 1981 and shall come into operation on 1st October 1981. Annotations Commencement I1 Reg. 1 in force at 1.10.1981, see reg. 1 ← Introduction Regulation 1 Regulation 2 →